User`s guide

Series D8 User’s Guide Chapter 7: Troubleshooting and Reconfiguring

Doc. 0600-3120-2000 Watlow Anafaze 175

RTD Inputs

For each RTD input, you must install three resistors: RA, RB,

and RC. The resistance must be correct for the expected input

range. RA and RB are a matched pair of resistors. Install them

in the resistor pack (RP) locations as shown in the illustration

below.

Resistor values:

• RA/RB: 25 kΩ

• RC: 18.2 Ω

Resistor tolerances:

• RA/RB: Matched to 0.02% (

±5 ppm/°C) with absolute

tolerance of 0.1% (

±25 ppm/°C)

• RC: Accurate to 0.05% (

±5ppm/°C)

Table 7.9 Resistor Locations for RTD Inputs

Loop

Resistor Values

RA/RB RC

1 RP1 R57

2 RP2 R55

3 RP3 R53

4 RP3 R51

5 RP4 R49

6 RP5 R47

7 RP6 R45

8 RP7 R43

RP#

RA RB